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the fuel ring) Materials and Methods Hydraulic oil analysis by drop test is one of the quick and simple chemical methods aimed at providing an indicative indication of the presence of water in the oil and the degree of oil contamination.
In principle, however, it is true that for general engineering with high demands on system reliability, hydraulic oil has the recommended purity class ISO 16/15/14.
[6] E, Sujová, D, Vysloužilová, I, Babic, Proposal for Evaluating the Efficiency of Production Processes Using External and Internal Key Performance Indicators, Manufacturing Technology, (2024), 24(3):440-447, DOI: 10.21062/mft.2024.050 [7] ISO 4406:1999: Výkon hydraulickej kvapaliny — Kvapaliny — Metóda kódovania úrovne kontaminácie pevnými časticami
Tribological properties of PEEK and its composite material during oil lubrication.

Bone tissue engineering is a most promising way to solve this tough problem .Using this method, artificial bone can be made out in vitro now.
Materials and methods Plasmid Construction. pMD-18T -VEGF was generated in the following way: human VEGF165 was cloned by the reverse transcription polymerase chain reaction (RT-PCR).
Discussion The present study is part of our serial studies in the vascularization of bone tissue engineering.
MSCs are most promising therapeutic potential cells in the regenerative medicine and tissue engineering, particularly in bone engineering.
Mao, Mesenchymal stem cells and tissue engineering.

Introduction Landfill gas (LFG) is a natural byproduct of the decomposition of organic material in municipal solid waste (MSW) under anaerobic conditions.
The production of landfill methane gas depends on several key characteristics, including waste composition, landfill design, and operating practices, as well as local climate conditions.
[2] Rivers State Government of Nigeria, The Greater Port Harcourt City Development Plan, Vol. 4, Section A – Waste Master Plan, Arcus Gibb Engineering and Science, 2009, p. 28
[3] Rivers State Government of Nigeria, The Greater Port Harcourt City Development Plan, Vol. 4, Section A – Waste Master Plan, Arcus Gibb Engineering and Science, 2009, p. 17
[6] Rivers State Government of Nigeria, The Greater Port Harcourt City Development Plan, Vol. 4, Section A – Waste Master Plan, Arcus Gibb Engineering and Science, 2009, p. 32

Enantioselective Degradation of Tebuconazole in Wheat and Soil under Open Field Conditions Xiaolan Ye1,a, Anguo Peng1,2,b*, Jing Qiu3,c*,Tingting Chai3,d, Hualin Zhao3,e , Xinghua Ge3,f 1School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421000, China 2School of Nuclear Science and Technology, University of South China, Hengyang, 421000, China 3Institute of Quality Standards & Testing Technology for Agro-Products, Key Laboratory of Agro-product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing 100081, China ayexiaolan920@163.com, b*agpeng@xum.edu.cn, c*qiujing@caas.cn, dgedac@126.com,ezhao3362699@126.com,fTianhedi888@163.com Keywords: Tebuconazole, Enantioselectivity, Degradation, Wheat, soil.
Experimental Materials, Reagents and Apparatus.
Table 3 Regressive equations of tebuconazole enantiomers in straw and soil Test material Enantiomer Regressive equationsa R² Half-livesb (days) Beijing sraw (-) y = 11.6743 e-0.1788 x R² = 0.9818 3.88c (+) y = 6.1452 e-0.1406 x R² = 0.9690 4.93d Zhejiang straw (-) y = 10.6641 e-0.1724 x R² = 0.7302 4.02c (+) y = 9.9908 e-0.1718 x R² = 0.7282 4.03c Beijing soil (-) y = 0.5833 e-0.0170 x R² = 0.7619 40.76c (+) y = 0.4886 e-0.0159 x R² = 0.7097 43.58c Zhejiang soil (-) y = 0.1611 e-0.0158 x R² = 0.7943 43.86c (+) y = 0.2396 e-0.0167 x R² = 0.7884 41.50c aThe regressive functions were obtained based on the mean value of three replicates.

To achieve this objective, we used X70 pipeline steel which commonly used in supercritical CO2 transmission pipeline as the experimental material.
Experimental Material and Method Experimental Material.
Ni, Effect of temperature on corrosion behavior of X70 steel in high pressure CO2/SO2/O2/H2O environments, Corrosion Engineering, Science and Technology. 48(2013) 121-129
Nesic, Key issues related to modeling of internal corrosion of oil and gas pipelines-a review, Corrosion Science. 49 (2007) 4308

It should be noted that the volumes of deep-hole prospecting drilling for oil and gas were five time reduced in recent years in comparison to 1990; the growth of reserves of carbon raw materials was three times reduced.
In fixed coordinate system a resulting vector, particularly current one, may be resolved into material and imaginary components
Power converters of voltage with double-sided carrying capacity as based on PWM is an multipurpose technical solution for development of closed-loop control systems for electric energy quality and grid losses minimization References [1] Key World Energy Statistics. – Paris: International Energy Agency, 2017. – 80 р
Volkov A.V. (2002) Analysis of electromagnetic processes and improvement of active filter regulation // Electrical engineering. №12. – p. 40-48

Study on the Land Use/Cover Changes of Mangrove Reserve of Shenzhen Bay based on Remote Sensing Date Qingchuan Chou1,a, Ruili Li2,b, Hualin Xu3,c, Jun Liu4,d, Xiuhua Shi5,e 1 College of Life Science, Shenzhen University, Shenzhen, Guangdong, 518060, China 2School of Environment and Energy, Peking University, Shenzhen, Guangdong, 518055, China 3 Conservancy of Neilingding Futian State Nature Reserve, Shenzhen, Guangdong, 518048, China 4 College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010019, China 5 Golf College Shenzhen University, Shenzhen, Guangdong, 518060, China achouqc@163.com, bliruili@pkusz.edu.cn, cxuhualin@126.com, d314026272@qq.com, eshxh100@163.com Key words: Remote sensing, Mangrove, Land use/cover change Abstract: This study used the remote sensing data of the mangrove reserve of Shenzhen bay in five different times (including 1986, 1993, 2000, 2008 and 2012), extracted the characteristics of land use
Land cover is a comprehensive body of natural material and artificial building covered on earth's surface with a particular attribute of time and space, its shape and state may change in a variety of spatial and temporal scales.
Materials and methods Study area Mangrove reserve of Shenzhen Bay is located in the northeast coast of Shenzhen Bay, (113°56'E, 22°29'N). , from the estuary of shenzhen River in the east, to the Che Kung temple in the west, with the area of 367.64hm2.
The reasons may be that the surrounded ponds aquaculture facilities were diamantled, surrounded ponds were filled, bird-watching stations and sea-watching platform were constructed, construction of roads and other engineering measures led to emergence a large number of bare land.

Materials and Methods 111 samples were obtained from wild rhesus macaques trapped in 5 localities (Heishui (20), Xiaojin (19), Bazhong (17), Jiulong (28) and Hanyuan (27)) of Sichuan province,.
Primer pairs were synthesed by Shanghai Sangon Biological Engineering Technology & Services Co., Ltd.
TABLE III The Genetic identity and genetic distances among 5 populations Pop ID Xiaojin Heishui Bazhong Hanyuan Jiulong Xiaojin — 0.8053 0.7477 0.7843 0.7993 Heishui 0.2165 — 0.6625 0.7747 0.7194 Bazhong 0.2908 0.4118 — 0.8576 0.8666 Hanyuan 0.2430 0.2908 0.1536 — 0.8819 Jiulong 0.2240 0.3293 0.1432 0.1257 — Note: Nei's (1978) genetic identity (above diagonal) and genetic distance (below diagonal) It is well known that genetic diversity exists in natural populations and is considered the raw material of evolution.
This work was supported by the Program for Changjiang Scholars and Innovative Research Team in University (IRT0848); Key laboratory of Animal Disease and Human Health of Sichuan Province (SZDSYS-200601), Natural Science Foundation of Educational Commission of Sichuan Province of China (08ZA076) and National Science Foundation of China (30970383).

Smith, A signal processing technique for detecting local defects in gears from the signal average of the vibration, Proceedings of the Institute of Mechanical Engineers 199 (C4) (1985) 287–292
[39] Zimroz, R., Bartelmus, W., Gearbox condition estimation using cyclo-stationary properties of vibration signal, Key Engineering Materials 413-414 (2009) 471–478

Optical engineers, employing diverse academic approaches, have struggled with the design of efficient and compact optical management with secondary optics.
First is bulk material absorption, which is usually 1 % or 2 % for acrylic polymers.
Lee , Fabrication of a beam shaping lens for chip scale packaged LEDs, Key Eng.